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4 decks of distributive law matching cards. For example, the card “2(a-3)” has the matching card “2a - 6”. The decks increase in complexity: Deck 1 uses only whole numbers (no variables) with pairs like “5 x 12” matching “5 x 10 + 5 x 2”. Deck 2 uses variables with matches like “2(a-3)” = “2a – 6”. Deck 3 uses variables, and the variable’s coefficient is not always the GCF. For example “2(11a – 3)” matches “22a – 6”. In Deck 4 some cards use 3 terms and